Basho Product Alert: Active Anti-Entropy in Riak 1.4.4 - 1.4.7

Dave Martorana dave at flyclops.com
Wed Jan 29 12:47:51 EST 2014


While nowhere near as important, does this bug also exist in the current
2.0 pre-releases?

Thanks,

Dave


On Wed, Jan 29, 2014 at 11:38 AM, Tom Santero <tsantero at basho.com> wrote:

> Hello,
>
> Basho Engineering has uncovered a bug in the Active Anti-Entropy (AAE)
> code in Riak versions 1.4.4 through 1.4.7, inclusive. This code incorrectly
> generates hashes resulting in AAE failing to repair data. Data will
> continue to be repaired via the standard read repair mechanisms. As the
> incorrect hash generation will utilize system resources with no useful
> result, our official recommendation is that you should not use AAE until a
> fix is released in 1.4.8.
>
> To disable AAE on a running cluster, perform a `riak attach`, then:
>
> a.
> rpc:multicall(riak_kv_entropy_manager, disable, []).
> rpc:multicall(riak_kv_entropy_manager, cancel_exchanges, []).
> z.
>
>
> then Press Ctrl-c a, then Enter to quit.
>
> Next, you'll want to disable AAE on restart. Adjust your the app.config
> file on all nodes in the cluster in the following manner:
>
> % Before
> {anti_entropy, {on, []}}
>
> % After
> {anti_entropy, {off, []}}
>
>
> Once again, this issue only affects Riak versions 1.4.4, 1.4.5, 1.4.6, and
> 1.4.7. There is no need to make changes to your cluster due to this bug if
> you are not running one of those versions, or if you are not using AAE. A
> forthcoming Riak 1.4.8 release will address this problem and be released in
> the next few days.
>
>
> Thank you,
> Basho
>
> _______________________________________________
> riak-users mailing list
> riak-users at lists.basho.com
> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
>
>
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